Check my page for several dozen "non-shulgin" ways of synthesizing amphetamine derivatives (there are no specific ones there for 4-MTA though).
Why would you want to perform that synthesis? The effects of 4-MTA are boring to mediocre, and it is pretty toxic and have lead to several deaths by itself, and not in combination with other substances. Ingestion of this compound is not reccommended.
References: http://ramindy.sghms.ac.uk/~ltg/4-mta.htm (http://ramindy.sghms.ac.uk/~ltg/4-mta.htm)
and http://www.ecstasy.org/info/4-MTA.html (http://www.ecstasy.org/info/4-MTA.html)